Ppg Industries, Inc.

Joseph D Kelly

Helmut Franz

Paul F Duffer

James L Valimont

Joseph P Cherenko

Larry S Sokol

William I Frey

A method is disclosed for applying a powdered interleaving material to a glass surface in the form of an aqueous composition comprising particulate interleaving material dispersed in atomized water.

Method of applying interleaving material to glass sheets

A method and composition utilizing porous particulate interleaving material treated with a strong organic acid are disclosed to reduce staining of stacked glass sheets.

Acidified powdered interleaving

A method is disclosed for applying a powdered interleaving material to a glass surface in the form of an aqueous slurry.

A method is disclosed for protecting glass surfaces in a stack of glass sheets by treating the surfaces with a stain-inhibiting organic hydroxy acid and separating adjacent surfaces with an interleaving material.

Two step interleaving method

A method is disclosed for protecting glass surfaces in a stack of glass sheets by treating the surfaces with a mixture of stain-inhibiting organic acids which crystallize on the glass, and separating adjacent surfaces with an interleaving material.

Mixed acid stain inhibitor

A method is disclosed for protecting glass surfaces in a stack of glass sheets by treating the surfaces with an organotin compound and separating adjacent surfaces with an interleaving material.

Organotin surface treatment and interleaving material for glass sheets

This invention relates to an arrangement of vacuum cups in a bent glass sheet sandwich assembly apparatus and a method of using said arrangement that provides a temporary bias to the central portion of a bent glass sheet to insure that a flexible sheet of interlayer material applied to the bent glass sheet initially engages its central portion and the area of engagement extends gradually to the edge of the sheets to avoid entrapment of air or other vapors in the interface of the resulting subassembly. When another bent glass sheet is applied to the opposite surface of the flexible sheet of interlayer material, the subassembly is temporarily biased once more to insure initial engagement in the central portion gradually extending to the edge of the sheets to avoid entrapment of air or other vapors in the interface of the subassembly with the second bent glass sheet.

Apparatus comprising arrangement of vacuum cups to assemble one or more

This invention relates to an arrangement of vacuum cups in a bent glass sheet sandwich assembly apparatus and method of using said arrangement that provides a temporary bias to the central portion of a bent glass sheet to insure that a flexible sheet of interlayer material applied to the bent glass sheet initially engages its central portion and the area of engagement extends gradually to the edge of the sheets to avoid entrapment of air or other vapors in the interface of the resulting subassembly. When another bent glass sheet is applied to the opposite surface of the flexible sheet of interlayer material, the subassembly is temporarily biased once more to insure initial engagement in the central portion gradually extending to the edge of the sheets to avoid entrapment of air or other vapors in the interface of the subassembly with the second bent glass sheet.

Arrangement of vacuum cups to assemble one or more bent glass sheets

A transparent safety glass laminate having an optically acceptable exposed plastic surface is fabricated by laminating an outer glass sheet and an inner preformed plastic sheet under heat and pressure with the plastic surface to be exposed supported against an optically smooth mold, preferably a second glass sheet, which is coated with an optically smooth coating of a material which acts as a release agent to facilitate separation of the plastic surface from the mold after lamination.

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Cheswick, PA, United States of America

Joseph D Kelly